KSX Radiator Left OEM Size KSX4042

The KSX Link Radiator KSX4042 is a left-side radiator replacement for Yamaha WR/YZ off-road motorcycles. This part provides reliable cooling and a direct, OEM-style replacement for damaged radiators, so your bike will be ready for your next ride.

• Position: Left radiator side — specially designed for the left side of the engine
• OEM Part Number: JU-KSX4042
• Compatibility: Fits Yamaha WR250F/WR450F and YZ250F/YZ450F models (model years 2018–2024)
• Material & Construction: Aluminum core with sturdy fins and durable end tanks for longer service life
• New & Ready for Installation: Brand new product, ready to use as a direct replacement
• Installation: Simple bolt-on replacement for factory mounting points with minimal modifications

This left-side radiator restores coolant flow and keeps your engine cool across a variety of riding conditions, whether you're taking long trips or competing in endurance races. Thanks to OEM-sized dimensions and fittings, it fits seamlessly without any modifications. The lightweight yet robust aluminum construction delivers durability against vibration and coolant chemicals, keeping your cooling system more reliable and maintaining consistent engine response throughout your ride.